One thing that you should keep in mind is that there are a lot of different traditions of meditation withing Theravada Buddhism. Some of the more major ones are the Mahasi Sayadaw tradition, the Pa Auk Sayadaw tradition, the U Ba Khin tradition (also called the Goenka tradition), and the Thai Forest tradition. Do you have any one of those in mind?

Are we supposed to be mindful all the time?Doesn't that make us not planning anything at all?Mindful means "flow" or does it mean be aware of everything?When doing things like listening to music for example I rather let my fantasy run wild instead being "aware" of everyhting around us.%%%